Oil filter



"July 1l, 1939. J, F WERDER OIL FILTER Filed April 2l, 1957 7, dm INVENTOR.

Patented July l1, 1939 UNITED nsrAfrEs PATENT oFFicE arcanes ou. FILTERl I John F. Werder, Lakewood, ohio Application April 21, 1937, Serial No. 138,219 4 claims. (ci. zin- 165) This invention relates to oil iilters ot the replaceable type such asare now used on automobiles, trucks, buses, aeroplanes,.etc. l 4

One of the'objects of the present invention is s. to prov-ide a filter which can be easily and quickly changed when the filtering element therein becomes clogged or full of foreign matter, such change tobe made without disconnecting any tubes or clamps.

:lo A still further object is to make a illter which is burst proof and, at'the same time, very inexpensive and easily assembled.

Still lfurther objects will appear from the following description and claims when Aconsidered with ll the accompanying drawing.

Most filters now in use on motor vehicles are attached to the dashboard or the motor itself with the removable clamp. Inlet and outlet tubes then carry the oil from. the motor through the .20 iilter and return it to the crankcase. After a few thousand miles running all lt'ers become clogged withkforeign matter so that they are of little if any value thereafter. With the type filter mentioned above it is necessary to disconnect the inlet and outlet tubes, then loosen the bracket and take out the old filter. A new filter is then put in place, the clamp tightened, and the inlet and outlet tubes again connected. All of this requires considerable time and often difficulties are en- ,30 `countered in attaching the inlet and outlet connections and a leak may develop. However, with proper ttings and sufficient time s'. satisfactory connection can be made,

There are also filters of the replaceable cartridge type now on the market in which the' in- ,let and outlet connections are not disturbed but a large cover on top of the filter is removed,'the old cartridge pulled out and the new one installed. The cover is then drawn up tightly with one or more screws against a gasket. The opening on this type of filter is necessarily large and difculties have been encountered with oil leaking out around the gasket. Any such leakage is. of course, very serious because the pressures on 45 the oiling system of modern englnesis relatively new one on in its place. Anyone who can change a spark plug can change my filter in a few secon time.

Fig. 1 is a diagrammatic view of my device attached toits bracket mounted on the motor block. 5 Fig. 2 is a diagrammatic view of a modified type of construction of the connecting joint itself.

In Fig. 1 numer'al I is a two piece spherical shell or case, the lower end of which terminates ln the screw connection 2. This connection 10 screws on to the motor fixture 3 which is permanently attached to the motor block 4 through the bracket 5 and the cap screw 6. Numeral 'I represents the nut which holds the motor fixture on the bracket. lli

I is `a spacer tube which supports steel washer 5. Il represents filtering medium which, for example, can be felt washers. Numeral II is an- 'other steel washer which is held in place by tube I2 which is flared out at I3 over the plug I4. I5 20 is a passage hole through tube I2 and I6 is a similar passage through tube 8. Il is a hole through the end wall of screw connection 2, and I5 is a ared portion on tube I2 to hold the whole internal assembly together. III is a tube pressed $5 into motor fixture 3 establishing connection with threaded opening 2li. Threaded opening 2| establishes connection with the annular space 22 between tube I9 and inside portion of body 3.

21 is a key to securely hold motor fixture 3 from I0 turning in bracket 5. 24 is the seam where the two halves of filter shell are pressed together.

25 is a sharp edge seat on body 2 which makes an oil tight fit against beveled end of fixture 3.

In Fig. 2 similar numbers indicate similar parts 35 in Fig. 1. 25 shows the sharp angle seat principle applied to the return flow vline as well as the intake.

In operation oil enters through 2|, flows up through passage 22 and holes I1 into support 40 tube l. From there it ows through hole I6 and then through filter medium III and through holes I5 and down through inside of tube I2 and on out through tube I9 and threaded opening 20. To change filters it is only necessary to unscrew the lter at screw connection 2 and put on a new one in its place. The sharp angle joint at 25 assures an oil tight connection which prevents leakage.

It will be noted that tube I2 merely slips into tube I9. This, I realize, does not establish an absolutely tight connection but is suiliciently tight for all practical purposes. If for any reason an absolutely tight connection is desired on both inlet and outlet flows I use the sharp angle seat on tubes I2 and I9' as shown in Fig. 2. In this Il 4'Ihisis an extremely inexpensive type oi' construction and the two halves can easily be soldered together. On a shell, for example, 4"- in diameter made out of light material and the joint only soldered a pressure of over nve hundred pounds will not cause a rupture or leak. 'I'his pressure -m'lskoi' course, much higher than called for on usual installations but it illustrates the strength o! my inexpensive type of construction.

'It will be noted that holes il are placed at the top end of supporting tube I. This leaves a sump at the bottom of shell i in which water and dirtcan accumulate and settle. Additional oil flowing through holes II will not tend to disturb any such settlements as may he accumulated.

It is obvious that the invention is not limited to the iilc forms as illustrated but that it may be odiiied further within the scope oi the appended claims.

I claim:

1. In a nlter, a casing with one opening, secured in said opening an internally threaded member with a seat formed by a counterbore extending beyond the threaded portion and of smaller diameter than said threaded portion, a wall at the end of said counterbore, a central hole thru the end of said wall and an o center hole thru saidwall between said counterbore and said central hole; a tube passing thru said central hole and attached thereto and extending inside said casing, filtering means surrounding said tubeinside of said casing so that fluid entering said casing thru said oi! center hole will pass thru said filtering means and come out thru said tube.

2. In a illter, a casing with one opening, secured in said opening an internally threaded member with a seat formed by a counterbore extending beyond the threaded portion and ot smaller diameter than said threaded portion. a wall at the end o! said counterbore, a central hole thru the end of said wall and an oil' center hole thru said wall between said counterbore and said centrai hole; `a tube passing thru said central holel and extending inside said casing and attached thereto, ltering means surrounding said'tube inside of said casing so that iluid entering said vcasing thru said oi! center hole will pass thru said internally threaded member and seat secured in said opening to establish Ia tight seal, a large bore running partially thru said block, and a smaller bore continuing thru the balance ot said block, both of these bores being on a projected axis of said seat and threads, a second tubular member mounted in said smaller bore and cooperating with said tube in said casing to establish a sliding connection therewith and also for-ming a separate channel between itself and said large bore in said bracket, and both tubes continuing said channel to communicate with said oit center hole in said internally threaded member secured in said opening, a side opening entering into said channel from the outside of said block, means for attaching inlet and outlet pipes to said side opening and smaller bore thru end of said block.

- 3. In a filter, two semi-spherical halves permanently joined together to form a complete sphere, a single opening in said sphere, an internally threaded thimble mounted in said opening, a circular seat within said thimble adjacent to the threads, a central opening thru th closed end of said thimble, a tube mounted in said central opening and extending into said sphere, a second opening in said closed end of said thimble located between said central opening and said seat and forming a channel communicating with the inside of said sphere, filtering means located about said tube within said sphere so that uid passing thru said second opening will flow thru said filtering means and come out thru said tube.

4.' In a lter, two semi-spherical halves permanently joinedtogether to form a complete sphere, a single opening in said sphere, an internally threaded thimble mounted in said opening, a circular seat within said thimble adjacent to the threads, a central opening thru the closed end of said thimble, a tube mounted in said central opening and extending into said sphere, a second opening in said closed end of said thimble located between said central opening and said seat and forming a channel communicating with the inside of said sphere, illtering means located about said tube so that fluid passing thru said second opening will now thru said filtering means and come out thru said tube, an externally threaded tting, a circular seat adjacent to the threads, said seat and threads cooperating with said seat and threads in above mentioned thimble to establish a tight seal, a large opening in said externally threaded fitting on the same axis as Said seat and threads and extending beyond said threads, a smaller opening at the end of said large opening running clear thru said iltting and on a projected axis of the large opening, a second tube secured in said smaller opening and extending thru said large opening and forming a channel between said tube and said large opening and cooperating with said tube in said thimble to establish a sliding connection therewith, aside opening entering into said channel from the outside of said iltting, means for connecting inlet and outlet pipes to openings in said fitting.

JOHN F. WERDER. 

